/* * films2.c -  使用结构表 */

#include <stdio.h>
#include <stdlib.h>

#include <string.h>

#define TSIZE 45

struct film {
    char title[TSIZE];
    int rating;
    struct film * next;
};

char * s_gets(char * st, int n);

int main(void)
{
    struct film * head = NULL;
    struct film * prev, *current;
    char input[TSIZE];

    puts("Enter first movie title:");
    while(s_gets(input, TSIZE) != NULL && input[0] != '\0') {
        current = (struct film *) malloc(sizeof(struct film));
        if (head == NULL) {
            head = current;
        } else {
            prev->next = current;
        }
        current->next =  NULL;
        strcpy(current->title, input);
        puts("Enter your rating<0-10>:");
        scanf("%d", &current->rating);
        while(getchar() != '\n') {
            continue;
        }
        puts("Enter next movi9e title(empty line to stop):");
        prev = current;
    }

    if (head == NULL) {
        printf("No data entered.");
    } else {
        printf("Here is the movie list:\n");

        current = head;

        while(current != NULL) {
            printf("Movie: %s rating: %d\n", current->title, current->rating);
            current = current->next;
        }

        current = head;

        while(current != NULL) {
            current = head;
            if (current != NULL) {
                head = current->next;
                free(current);
            }
        }

    }
    printf("Bye!\n");
    return 0;
}

char * s_gets(char * st, int n)
{
    char * ret_val;
    char * find;

    ret_val = fgets(st, n ,stdin);
    if(ret_val)
    {
        find = strchr(st, '\n');
        if (find) {
            *find = '\0';
        } else {
            while(getchar() != '\n') {
                continue;
            }
        }
    }
    return ret_val;
}
